Roads by 10: Location Guide
This is an approximate indication of the geographical areas corresponding to each Roads by 10 group. It can only be a rough guide, since for obvious reasons the groups don't fit conveniently within county boundaries, but it should help readers unfamiliar with the numbering system to find their way around.

Listed separately are the misplaced roads, where a number has been transplanted from its original location to another location elsewhere in the same zone. (For instance, Chris Bertram has noted that the A403 is in South Gloucestershire rather than West London, while the A437 is in West London rather than Gloucestershire; maybe they should be swapped!).

	2nd digit 0	2nd digit 1	2nd digit 2	2nd digit 3	2nd digit 4	2nd digit 5	2nd digit 6	2nd digit 7	2nd digit 8	2nd digit 9
Zone 1	N & E London (Inner)	N & E London (Outer)	Essex	In and around Suffolk	Norfolk	Lincolnshire	N & E Yorkshire	Teesside	County Durham	Tyneside, Northumberland, E Lothian
Zone 2	SE London	S London (Inner)	W Kent	S London (Outer)	W Surrey	E Kent	E Sussex	Across Sussex	W Sussex	Across SE England
Zone 3	SW London (Inner)	SW London (Outer)	E Surrey	Hampshire	In and around Wiltshire	Dorset	Somerset	In and around E Devon	W Devon	Cornwall
Zone 4	W London	Thames to Severn corridor	In and around Buckinghamshire	Gloucestershire	Worcestershire	W Midlands	Black Country, SE Wales	S Wales	W Wales	Mid Wales
Zone 5	NW London, Bedfordshire, Northamptonshire	N Midlands	In and around Staffordshire	Cheshire	N Wales	Wirral	Merseyside	Greater Manchester (S)	W Lancashire	Cumbria
Zone 6	Hertfordshire to Nottinghamshire	Nottinghamshire	Derbyshire	S Yorkshire	W Yorkshire		Greater Manchester (N)	East Lancashire	Pennines	Northumberland, Scottish Borders
Zone 7	Across the Southern Uplands	Dumfries & Galloway	Lanarkshire	Ayrshire	Across SW Scotland					Empty
Zone 8	Greater Glasgow	Dunbarton & Argyll	Perth & Kinross	SW Highlands	SW Islands	Skye & Lewis	Western Isles	Across NW Scotland
Zone 9	In and around W Lothian	Fife	Tayside	Angus	Aberdeenshire		Orkney	Across E Scotland

Misplaced Roads

Number	Intended Location	Actual Location
A135	Suffolk	Teesside
A139	Suffolk	Teesside
A154	Lincolnshire	Suffolk
A176	Teesside	Essex
A180	County Durham	Lincolnshire
A249	West Surrey	Kent
A282	West Sussex	Kent/Essex
A289	West Sussex	Kent
A303	South West London	Hampshire/Wiltshire/Somerset/Devon
A326	East Surrey	Hampshire
A355	Dorset	Buckinghamshire/Berkshire
A396	Cornwall	Somerset/Devon
A397	Cornwall	Hampshire
A403	West London	South Gloucestershire
A437	Gloucestershire	West London
A455	West Midlands	South Wales
A491	Mid-Wales	West Midlands
A500	NW London/Beds/Northants	Staffordshire/Cheshire
A506	NW London/Beds/Northants	Merseyside
A510	North Midlands	Northamptonshire
A563	Merseyside	Leicestershire
A564	Merseyside	Derbyshire (deceased)
A594	Cumbria (correctly)	Duplicated in Leicestershire
A598	Cumbria	North West London
A599	Cumbria	Merseyside
A601	Hertfordshire/Bedfordshire	Derbyshire (A601(M) in Lancashire)
A648	West Yorkshire	Nottinghamshire (deceased)
A719	Dumfries and Galloway	Ayrshire
A720	Lanarkshire	Edinburgh
A949	Aberdeenshire	Highland (Dornoch Firth)
A968	Orkney	Shetland
A969	Orkney	Shetland

Compiled by Guy Barry